Title:
METHOD AND SYSTEM FOR PURIFYING GLYCERIN, METHOD FOR PRODUCING STRIPPING AGENT, AND STRIPPING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/059885
Kind Code:
A1
Abstract:
Provided is a method for purifying glycerin from a raw material which contains glycerin and at least one type of glycerin fatty acid ester, the method being characterized by including: a first separation step for mixing the raw material with an inorganic acid and separating a first oil component and a first glycerin liquid; a neutralization step for neutralizing the first glycerin liquid using an alkaline substance; and a second separation step for separating a second oil component and a precipitated inorganic salt from the neutralized glycerin liquid. The present invention enables inexpensive purification of glycerin from a raw material containing glycerin and a glycerin fatty acid ester while lowering the burden on the environment. In addition, the present invention provides a system for purifying glycerin, a method for producing a stripping agent for a composition containing asphalt or cement, and a stripping method.
Inventors:
KAJIMA HIROSHI (JP)
Application Number:
PCT/JP2019/037140
Publication Date:
March 26, 2020
Filing Date:
September 20, 2019
Export Citation:
Assignee:
BIOFUEL TECH RESEARCH CO LTD (JP)
International Classes:
C07C29/88; B28B7/38; C07C31/22; C09K3/00
Domestic Patent References:
| WO2017174775A1 | 2017-10-12 |
Foreign References:
| CN103772149A | 2014-05-07 | |||
| JP96678C2 | ||||
| JP50004C2 | ||||
| JP2012211248A | 2012-11-01 | |||
| JP2006241409A | 2006-09-14 | |||
| JPH09507181A | 1997-07-22 | |||
| JP2002018823A | 2002-01-22 |
Attorney, Agent or Firm:
HAYAKAWA Yuzi et al. (JP)
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